$ git clone -n https://src.fedoraproject.org/rpms/kde-gtk-config.git /var/lib/mock/f41-build-side-115201-61076510-6588647/root/chroot_tmpdir/scmroot/kde-gtk-config
Cloning into '/var/lib/mock/f41-build-side-115201-61076510-6588647/root/chroot_tmpdir/scmroot/kde-gtk-config'...
$ git fetch origin 48db46e29e5828cbc856679bfb4e9e4351c9eba9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kde-gtk-config
 * [new ref]         48db46e29e5828cbc856679bfb4e9e4351c9eba9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 48db46e 6.4.3