$ git clone -n https://src.fedoraproject.org/rpms/merkuro.git /var/lib/mock/f42-build-864433-172302/root/chroot_tmpdir/scmroot/merkuro
Cloning into '/var/lib/mock/f42-build-864433-172302/root/chroot_tmpdir/scmroot/merkuro'...
$ git fetch origin b2e82c9bf753e622f8eeada47fab02b3edfbb0ba:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/merkuro
 * [new ref]         b2e82c9bf753e622f8eeada47fab02b3edfbb0ba -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b2e82c9 24.12.0