$ git clone -n https://src.fedoraproject.org/rpms/ghc-http-common.git /var/lib/mock/f40-build-2048003-48982/root/chroot_tmpdir/scmroot/ghc-http-common
Cloning into '/var/lib/mock/f40-build-2048003-48982/root/chroot_tmpdir/scmroot/ghc-http-common'...
$ git fetch origin bdc99edf08feb8bc085c1355c7d359d3d99696a3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-http-common
 * [new ref]         bdc99edf08feb8bc085c1355c7d359d3d99696a3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bdc99ed bump release