$ git clone -n https://src.fedoraproject.org/rpms/ghc-regex-applicative.git /var/lib/mock/f45-build-10677-419/root/chroot_tmpdir/scmroot/ghc-regex-applicative
Cloning into '/var/lib/mock/f45-build-10677-419/root/chroot_tmpdir/scmroot/ghc-regex-applicative'...
$ git fetch origin 8bf5595919eeee9e3526e382bf6f5a3f7efc5b39:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-regex-applicative
 * [new ref]         8bf5595919eeee9e3526e382bf6f5a3f7efc5b39 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8bf5595 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild