$ git clone -n https://src.fedoraproject.org/rpms/ImageMagick.git /var/lib/mock/f41-build-839002-159978/root/chroot_tmpdir/scmroot/ImageMagick
Cloning into '/var/lib/mock/f41-build-839002-159978/root/chroot_tmpdir/scmroot/ImageMagick'...
$ git fetch origin c5cca116a9b9352837983f8f6da0cf2d691488c9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ImageMagick
 * [new ref]         c5cca116a9b9352837983f8f6da0cf2d691488c9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c5cca11 Build with Epoch for ELN