$ git clone -n https://src.fedoraproject.org/rpms/ksirk.git /var/lib/mock/f40-build-1221617-22751/root/chroot_tmpdir/scmroot/ksirk
Cloning into '/var/lib/mock/f40-build-1221617-22751/root/chroot_tmpdir/scmroot/ksirk'...
$ git fetch origin a2a1b07c11128b044ff6f05efe5eb5205faeeaff:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ksirk
 * [new ref]         a2a1b07c11128b044ff6f05efe5eb5205faeeaff -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a2a1b07 Rebuild (qt6)