$ git clone -n https://src.fedoraproject.org/rpms/kcron.git /var/lib/mock/f39-build-1666149-40769/root/chroot_tmpdir/scmroot/kcron
Cloning into '/var/lib/mock/f39-build-1666149-40769/root/chroot_tmpdir/scmroot/kcron'...
$ git fetch origin 52697c50f02ca4c7294a8f3aaa30acbf5628cf88:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kcron
 * [new ref]         52697c50f02ca4c7294a8f3aaa30acbf5628cf88 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 52697c5 23.08.2