$ git clone -n https://src.fedoraproject.org/rpms/perl-BerkeleyDB.git /var/lib/mock/f45-build-21880-588/root/chroot_tmpdir/scmroot/perl-BerkeleyDB
Cloning into '/var/lib/mock/f45-build-21880-588/root/chroot_tmpdir/scmroot/perl-BerkeleyDB'...
$ git fetch origin fee2790887bb56bbe64923293f5ea1d8cac3df5b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-BerkeleyDB
 * [new ref]         fee2790887bb56bbe64923293f5ea1d8cac3df5b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fee2790 Perl 5.44 rebuild