$ git clone -n https://src.fedoraproject.org/rpms/merkuro.git /var/lib/mock/f41-build-857763-168205/root/chroot_tmpdir/scmroot/merkuro
Cloning into '/var/lib/mock/f41-build-857763-168205/root/chroot_tmpdir/scmroot/merkuro'...
$ git fetch origin a015b377b897d649a6e3f22984e2c6031a7806be:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/merkuro
 * [new ref]         a015b377b897d649a6e3f22984e2c6031a7806be -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a015b37 24.08.2