$ git clone -n https://src.fedoraproject.org/rpms/syslinux.git /var/lib/mock/f39-build-1512403-35565/root/chroot_tmpdir/scmroot/syslinux
Cloning into '/var/lib/mock/f39-build-1512403-35565/root/chroot_tmpdir/scmroot/syslinux'...
$ git fetch origin df77871b01c2ee0197470eefa5007fc668ddc743:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/syslinux
 * [new ref]         df77871b01c2ee0197470eefa5007fc668ddc743 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at df77871 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild