$ git clone -n https://src.fedoraproject.org/rpms/perl-DBM-Deep.git /var/lib/mock/f45-build-22845-594/root/chroot_tmpdir/scmroot/perl-DBM-Deep
Cloning into '/var/lib/mock/f45-build-22845-594/root/chroot_tmpdir/scmroot/perl-DBM-Deep'...
$ git fetch origin 47af242943a83104c919a023c6dfdf4a65fd137d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-DBM-Deep
 * [new ref]         47af242943a83104c919a023c6dfdf4a65fd137d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 47af242 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild