$ git clone -n https://src.fedoraproject.org/rpms/perl-mecab.git /var/lib/mock/f45-build-27702-625/root/chroot_tmpdir/scmroot/perl-mecab
Cloning into '/var/lib/mock/f45-build-27702-625/root/chroot_tmpdir/scmroot/perl-mecab'...
$ git fetch origin 991a2a1d2aabefb14e3a0b8bd5080589ccee72b7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-mecab
 * [new ref]         991a2a1d2aabefb14e3a0b8bd5080589ccee72b7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 991a2a1 Perl 5.44 rebuild