$ git clone -n https://src.fedoraproject.org/rpms/perl-B-Hooks-Parser.git /var/lib/mock/f45-build-21842-588/root/chroot_tmpdir/scmroot/perl-B-Hooks-Parser
Cloning into '/var/lib/mock/f45-build-21842-588/root/chroot_tmpdir/scmroot/perl-B-Hooks-Parser'...
$ git fetch origin 175e4bb9c4589e0421aad28ec495af9127a6cd5b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-B-Hooks-Parser
 * [new ref]         175e4bb9c4589e0421aad28ec495af9127a6cd5b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 175e4bb Perl 5.44 rebuild