$ git clone -n https://src.fedoraproject.org/rpms/cpipe.git /var/lib/mock/f45-build-4757-334/root/chroot_tmpdir/scmroot/cpipe
Cloning into '/var/lib/mock/f45-build-4757-334/root/chroot_tmpdir/scmroot/cpipe'...
$ git fetch origin d1a1c2c6214cc5e0891e4da1d03666a4093de9e2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cpipe
 * [new ref]         d1a1c2c6214cc5e0891e4da1d03666a4093de9e2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d1a1c2c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild