$ git clone -n https://src.fedoraproject.org/rpms/ghc-vault.git /var/lib/mock/f45-build-10953-425/root/chroot_tmpdir/scmroot/ghc-vault
Cloning into '/var/lib/mock/f45-build-10953-425/root/chroot_tmpdir/scmroot/ghc-vault'...
$ git fetch origin 2ef67021bdf4928a4c416e3c68441e55c38be6cf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-vault
 * [new ref]         2ef67021bdf4928a4c416e3c68441e55c38be6cf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2ef6702 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild