$ git clone -n https://src.fedoraproject.org/rpms/ghc-cmark-gfm.git /var/lib/mock/f45-build-10076-413/root/chroot_tmpdir/scmroot/ghc-cmark-gfm
Cloning into '/var/lib/mock/f45-build-10076-413/root/chroot_tmpdir/scmroot/ghc-cmark-gfm'...
$ git fetch origin e6c39f2551025c1047fcee61b707b15902aabac6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-cmark-gfm
 * [new ref]         e6c39f2551025c1047fcee61b707b15902aabac6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e6c39f2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild