$ git clone -n https://src.fedoraproject.org/rpms/ghc-unbounded-delays.git /var/lib/mock/f38-build-side-42-init-devel-939283-28757/root/chroot_tmpdir/scmroot/ghc-unbounded-delays
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-939283-28757/root/chroot_tmpdir/scmroot/ghc-unbounded-delays'...
$ git fetch origin e17fa3496b92b8c087ca7de6a32eb372f21d288a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-unbounded-delays
 * [new ref]         e17fa3496b92b8c087ca7de6a32eb372f21d288a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e17fa34 Convert to %autorelease and %autochangelog