$ git clone -n https://src.fedoraproject.org/rpms/merkaartor.git /var/lib/mock/f41-build-847438-163983/root/chroot_tmpdir/scmroot/merkaartor
Cloning into '/var/lib/mock/f41-build-847438-163983/root/chroot_tmpdir/scmroot/merkaartor'...
$ git fetch origin b99a83cc8af5086365615422a3caf5c87b4d60d1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/merkaartor
 * [new ref]         b99a83cc8af5086365615422a3caf5c87b4d60d1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b99a83c System qtsingleapplication-qt6 only available on F40+/EL10+.