$ git clone -n https://src.fedoraproject.org/rpms/dcraw.git /var/lib/mock/f40-build-2197799-51684/root/chroot_tmpdir/scmroot/dcraw
Cloning into '/var/lib/mock/f40-build-2197799-51684/root/chroot_tmpdir/scmroot/dcraw'...
$ git fetch origin 05a31cc63243abf120fb6eb3f22dd39630b6e3ff:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dcraw
 * [new ref]         05a31cc63243abf120fb6eb3f22dd39630b6e3ff -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 05a31cc Rebuild for jasper 4.1