$ git clone -n https://src.fedoraproject.org/rpms/xtl.git /var/lib/mock/f39-build-2063603-49190/root/chroot_tmpdir/scmroot/xtl
Cloning into '/var/lib/mock/f39-build-2063603-49190/root/chroot_tmpdir/scmroot/xtl'...
$ git fetch origin 1034ec513a7b6210bc5ca8a7f49867c7102fe78b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xtl
 * [new ref]         1034ec513a7b6210bc5ca8a7f49867c7102fe78b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1034ec5 Update to latest version (#2254609)