$ git clone -n https://src.fedoraproject.org/rpms/perl-Syntax-Keyword-Defer.git /var/lib/mock/f45-build-26347-617/root/chroot_tmpdir/scmroot/perl-Syntax-Keyword-Defer
Cloning into '/var/lib/mock/f45-build-26347-617/root/chroot_tmpdir/scmroot/perl-Syntax-Keyword-Defer'...
$ git fetch origin 946d1f171efacaa463862ba1bd1368a84b261560:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Syntax-Keyword-Defer
 * [new ref]         946d1f171efacaa463862ba1bd1368a84b261560 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 946d1f1 Perl 5.44 re-rebuild of bootstrapped packages