$ git clone -n https://src.fedoraproject.org/rpms/perl-Parse-MIME.git /var/lib/mock/f45-build-25662-612/root/chroot_tmpdir/scmroot/perl-Parse-MIME
Cloning into '/var/lib/mock/f45-build-25662-612/root/chroot_tmpdir/scmroot/perl-Parse-MIME'...
$ git fetch origin 5d12a2bdca0554e0b6a07d629e24d35bfa331a36:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Parse-MIME
 * [new ref]         5d12a2bdca0554e0b6a07d629e24d35bfa331a36 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5d12a2b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild