$ git clone -n https://src.fedoraproject.org/rpms/kdiamond.git /var/lib/mock/f42-flatpak-app-build-60935308-6586216/root/chroot_tmpdir/scmroot/kdiamond
Cloning into '/var/lib/mock/f42-flatpak-app-build-60935308-6586216/root/chroot_tmpdir/scmroot/kdiamond'...
$ git fetch origin 808b59bef8fe120921792bcfccc8ed487bcdce58:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kdiamond
 * [new ref]         808b59bef8fe120921792bcfccc8ed487bcdce58 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 808b59b 25.04.3