$ git clone -n https://src.fedoraproject.org/rpms/perl-Email-MIME-Encodings.git /var/lib/mock/f45-build-23310-596/root/chroot_tmpdir/scmroot/perl-Email-MIME-Encodings
Cloning into '/var/lib/mock/f45-build-23310-596/root/chroot_tmpdir/scmroot/perl-Email-MIME-Encodings'...
$ git fetch origin e9e1e07ecba110ff9211f396ef0c7ea61d92eb56:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Email-MIME-Encodings
 * [new ref]         e9e1e07ecba110ff9211f396ef0c7ea61d92eb56 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e9e1e07 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild