$ git clone -n https://src.fedoraproject.org/rpms/ghc-hourglass.git /var/lib/mock/f38-build-side-42-init-devel-967377-28808/root/chroot_tmpdir/scmroot/ghc-hourglass
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-967377-28808/root/chroot_tmpdir/scmroot/ghc-hourglass'...
$ git fetch origin c5ec6abc50bfd5eb3c573662f0dd540e63c3ad4c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-hourglass
 * [new ref]         c5ec6abc50bfd5eb3c573662f0dd540e63c3ad4c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c5ec6ab Convert to %autorelease and %autochangelog