$ git clone -n https://src.fedoraproject.org/rpms/libXfont2.git /var/lib/mock/f40-build-2220010-52649/root/chroot_tmpdir/scmroot/libXfont2
Cloning into '/var/lib/mock/f40-build-2220010-52649/root/chroot_tmpdir/scmroot/libXfont2'...
$ git fetch origin a3d0a0906aaed2958a5d64e3873e3c83aea14038:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libXfont2
 * [new ref]         a3d0a0906aaed2958a5d64e3873e3c83aea14038 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a3d0a09 libXfont2 2.0.6