$ git clone -n https://src.fedoraproject.org/rpms/kcalc.git /var/lib/mock/f39-build-1676937-40954/root/chroot_tmpdir/scmroot/kcalc
Cloning into '/var/lib/mock/f39-build-1676937-40954/root/chroot_tmpdir/scmroot/kcalc'...
$ git fetch origin db442ebfc17911f479646d88867d00373ae7aa41:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kcalc
 * [new ref]         db442ebfc17911f479646d88867d00373ae7aa41 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at db442eb 23.08.2