$ git clone -n https://src.fedoraproject.org/rpms/ghc-cairo.git /var/lib/mock/f38-build-side-42-init-devel-770907-27757/root/chroot_tmpdir/scmroot/ghc-cairo
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-770907-27757/root/chroot_tmpdir/scmroot/ghc-cairo'...
$ git fetch origin 45ec9f6d1d0c92c5ab7546d5dc17f8a5ab860c86:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-cairo
 * [new ref]         45ec9f6d1d0c92c5ab7546d5dc17f8a5ab860c86 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 45ec9f6 Convert to %autorelease and %autochangelog