$ git clone -n https://src.fedoraproject.org/rpms/perl-Sub-Attribute.git /var/lib/mock/f45-build-26349-617/root/chroot_tmpdir/scmroot/perl-Sub-Attribute
Cloning into '/var/lib/mock/f45-build-26349-617/root/chroot_tmpdir/scmroot/perl-Sub-Attribute'...
$ git fetch origin 36331a4a6ce6658668d96fc4ff5f8f5bd69165e5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Sub-Attribute
 * [new ref]         36331a4a6ce6658668d96fc4ff5f8f5bd69165e5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 36331a4 Perl 5.44 rebuild