$ git clone -n https://src.fedoraproject.org/rpms/perl-Text-WordDiff.git /var/lib/mock/f45-build-27168-621/root/chroot_tmpdir/scmroot/perl-Text-WordDiff
Cloning into '/var/lib/mock/f45-build-27168-621/root/chroot_tmpdir/scmroot/perl-Text-WordDiff'...
$ git fetch origin 3e620e198ec7bb33c33b5de9481345a11a2c7569:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Text-WordDiff
 * [new ref]         3e620e198ec7bb33c33b5de9481345a11a2c7569 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3e620e1 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild