$ git clone -n https://src.fedoraproject.org/rpms/perl-Archive-Peek.git /var/lib/mock/f45-build-21773-588/root/chroot_tmpdir/scmroot/perl-Archive-Peek
Cloning into '/var/lib/mock/f45-build-21773-588/root/chroot_tmpdir/scmroot/perl-Archive-Peek'...
$ git fetch origin e318408b03a30e0141a93adbea6a43a4806fef8a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Archive-Peek
 * [new ref]         e318408b03a30e0141a93adbea6a43a4806fef8a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e318408 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild