$ git clone -n https://src.fedoraproject.org/rpms/ghc-network-multicast.git /var/lib/mock/f45-build-10580-419/root/chroot_tmpdir/scmroot/ghc-network-multicast
Cloning into '/var/lib/mock/f45-build-10580-419/root/chroot_tmpdir/scmroot/ghc-network-multicast'...
$ git fetch origin 2c976a0213a53165c4f2ed2fda17c5e5f4d50972:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-network-multicast
 * [new ref]         2c976a0213a53165c4f2ed2fda17c5e5f4d50972 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2c976a0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild