$ git clone -n https://src.fedoraproject.org/rpms/ksirk.git /var/lib/mock/f40-build-1936744-25145/root/chroot_tmpdir/scmroot/ksirk
Cloning into '/var/lib/mock/f40-build-1936744-25145/root/chroot_tmpdir/scmroot/ksirk'...
$ git fetch origin 7554f8682daa3fc9cf088eee72a2df0c990a2998:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ksirk
 * [new ref]         7554f8682daa3fc9cf088eee72a2df0c990a2998 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7554f86 24.05.2