$ git clone -n https://src.fedoraproject.org/rpms/pop-launcher.git /var/lib/mock/f42-build-59083092-6570930/root/chroot_tmpdir/scmroot/pop-launcher
Cloning into '/var/lib/mock/f42-build-59083092-6570930/root/chroot_tmpdir/scmroot/pop-launcher'...
$ git fetch origin 7fe29536d6a07d72b7f826173b00292c91d8871d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pop-launcher
 * [new ref]         7fe29536d6a07d72b7f826173b00292c91d8871d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7fe2953 "Update to 1.0.0~alpha.7"