$ git clone -n https://src.fedoraproject.org/rpms/ghc-asn1-encoding.git /var/lib/mock/f41-build-839555-160219/root/chroot_tmpdir/scmroot/ghc-asn1-encoding
Cloning into '/var/lib/mock/f41-build-839555-160219/root/chroot_tmpdir/scmroot/ghc-asn1-encoding'...
$ git fetch origin 74035f75d637ea6b1c87d5ad5a03e52f658562b2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-asn1-encoding
 * [new ref]         74035f75d637ea6b1c87d5ad5a03e52f658562b2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 74035f7 bump release