$ git clone -n https://src.fedoraproject.org/rpms/perl-DateTime-Tiny.git /var/lib/mock/f45-build-23052-595/root/chroot_tmpdir/scmroot/perl-DateTime-Tiny
Cloning into '/var/lib/mock/f45-build-23052-595/root/chroot_tmpdir/scmroot/perl-DateTime-Tiny'...
$ git fetch origin e6619979600ab35ba4f5ab602264dbfe46f8c5cf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-DateTime-Tiny
 * [new ref]         e6619979600ab35ba4f5ab602264dbfe46f8c5cf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e661997 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild