$ git clone -n https://src.fedoraproject.org/rpms/hylafax+.git /var/lib/mock/f38-build-side-42-init-devel-941700-28758/root/chroot_tmpdir/scmroot/hylafax+
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-941700-28758/root/chroot_tmpdir/scmroot/hylafax+'...
$ git fetch origin 21ac179c882b9f21764db19a170a605eac8dde96:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/hylafax+
 * [new ref]         21ac179c882b9f21764db19a170a605eac8dde96 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 21ac179 Fix C99 compatibility issues in the non-autoconf configure script