$ git clone -n https://src.fedoraproject.org/rpms/aws-c-common.git /var/lib/mock/f41-build-side-1-2749720-31005/root/chroot_tmpdir/scmroot/aws-c-common
Cloning into '/var/lib/mock/f41-build-side-1-2749720-31005/root/chroot_tmpdir/scmroot/aws-c-common'...
$ git fetch origin 275558dcee06e7c9f4234f8f52d8ee2a8aaae152:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/aws-c-common
 * [new ref]         275558dcee06e7c9f4234f8f52d8ee2a8aaae152 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 275558d Update to 0.9.28 upstream release