$ git clone -n https://src.fedoraproject.org/rpms/ghc-skein.git /var/lib/mock/f38-build-side-42-init-devel-651228-26477/root/chroot_tmpdir/scmroot/ghc-skein
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-651228-26477/root/chroot_tmpdir/scmroot/ghc-skein'...
$ git fetch origin 1ce3a11854b43b0c50fcb0591e5d6bfcb7b7760c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-skein
 * [new ref]         1ce3a11854b43b0c50fcb0591e5d6bfcb7b7760c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1ce3a11 Convert to %autorelease and %autochangelog