$ git clone -n https://src.fedoraproject.org/rpms/perl-Class-Mix.git /var/lib/mock/f45-build-22367-591/root/chroot_tmpdir/scmroot/perl-Class-Mix
Cloning into '/var/lib/mock/f45-build-22367-591/root/chroot_tmpdir/scmroot/perl-Class-Mix'...
$ git fetch origin ab00f385da8960618043ab12ef98cb117ce9c8cb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Class-Mix
 * [new ref]         ab00f385da8960618043ab12ef98cb117ce9c8cb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ab00f38 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild