$ git clone -n https://src.fedoraproject.org/rpms/rundoc.git /var/lib/mock/f40-build-2679353-67930/root/chroot_tmpdir/scmroot/rundoc
Cloning into '/var/lib/mock/f40-build-2679353-67930/root/chroot_tmpdir/scmroot/rundoc'...
$ git fetch origin 7dff18d5d17eff93f2b3c8042c77f1574509a873:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rundoc
 * [new ref]         7dff18d5d17eff93f2b3c8042c77f1574509a873 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7dff18d Rebuilt for java-21-openjdk as system jdk