$ git clone -n https://src.fedoraproject.org/rpms/perl-Format-Human-Bytes.git /var/lib/mock/f45-build-23641-598/root/chroot_tmpdir/scmroot/perl-Format-Human-Bytes
Cloning into '/var/lib/mock/f45-build-23641-598/root/chroot_tmpdir/scmroot/perl-Format-Human-Bytes'...
$ git fetch origin 50e0fde9024bd5f5f04c5b8fc782dfaee3292bb8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Format-Human-Bytes
 * [new ref]         50e0fde9024bd5f5f04c5b8fc782dfaee3292bb8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 50e0fde Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild