$ git clone -n https://src.fedoraproject.org/rpms/ghc-zlib.git /var/lib/mock/f39-build-1711712-41228/root/chroot_tmpdir/scmroot/ghc-zlib
Cloning into '/var/lib/mock/f39-build-1711712-41228/root/chroot_tmpdir/scmroot/ghc-zlib'...
$ git fetch origin daed90ad2fe167edffee31f10214ac094d1674b5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-zlib
 * [new ref]         daed90ad2fe167edffee31f10214ac094d1674b5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at daed90a bump release