$ git clone -n https://src.fedoraproject.org/rpms/macchanger.git /var/lib/mock/f45-build-17903-505/root/chroot_tmpdir/scmroot/macchanger
Cloning into '/var/lib/mock/f45-build-17903-505/root/chroot_tmpdir/scmroot/macchanger'...
$ git fetch origin 2445bf06d507af0d4e2852a62ef4649a7e0f9b72:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/macchanger
 * [new ref]         2445bf06d507af0d4e2852a62ef4649a7e0f9b72 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2445bf0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild