$ git clone -n https://src.fedoraproject.org/rpms/perl-Compress-Bzip2.git /var/lib/mock/f45-build-22430-591/root/chroot_tmpdir/scmroot/perl-Compress-Bzip2
Cloning into '/var/lib/mock/f45-build-22430-591/root/chroot_tmpdir/scmroot/perl-Compress-Bzip2'...
$ git fetch origin b4a436d863f6da284ce197c7871b023736fb0f0b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Compress-Bzip2
 * [new ref]         b4a436d863f6da284ce197c7871b023736fb0f0b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b4a436d Perl 5.44 re-rebuild of bootstrapped packages