$ git clone -n https://src.fedoraproject.org/rpms/imsprog.git /var/lib/mock/f42-build-side-1-3505967-45995/root/chroot_tmpdir/scmroot/imsprog
Cloning into '/var/lib/mock/f42-build-side-1-3505967-45995/root/chroot_tmpdir/scmroot/imsprog'...
$ git fetch origin e9b578f6e4d3b14d25569d56d467311a470e2b0e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/imsprog
 * [new ref]         e9b578f6e4d3b14d25569d56d467311a470e2b0e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e9b578f v1.5.2