$ git clone -n https://src.fedoraproject.org/rpms/perl-Socket6.git /var/lib/mock/f45-build-26231-616/root/chroot_tmpdir/scmroot/perl-Socket6
Cloning into '/var/lib/mock/f45-build-26231-616/root/chroot_tmpdir/scmroot/perl-Socket6'...
$ git fetch origin 9ddd02cf7adf98d2dba8ec83ecefe4a0c88ffaaa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Socket6
 * [new ref]         9ddd02cf7adf98d2dba8ec83ecefe4a0c88ffaaa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9ddd02c Perl 5.44 rebuild