$ git clone -n https://src.fedoraproject.org/rpms/libtalloc.git /var/lib/mock/f40-build-2008492-45379/root/chroot_tmpdir/scmroot/libtalloc
Cloning into '/var/lib/mock/f40-build-2008492-45379/root/chroot_tmpdir/scmroot/libtalloc'...
$ git fetch origin 0944f2d51591ce79d1de1f40418c544686034422:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libtalloc
 * [new ref]         0944f2d51591ce79d1de1f40418c544686034422 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0944f2d libtalloc-2.4.1 is available