$ git clone -n https://src.fedoraproject.org/rpms/ispc.git /var/lib/mock/f38-build-side-42-init-devel-1119592-30223/root/chroot_tmpdir/scmroot/ispc
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1119592-30223/root/chroot_tmpdir/scmroot/ispc'...
$ git fetch origin 775f7e90efa4a13351d5e3ddea8d7eb53c029f98:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ispc
 * [new ref]         775f7e90efa4a13351d5e3ddea8d7eb53c029f98 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 775f7e9 libispcrt_static.a needed for ospray