$ git clone -n https://src.fedoraproject.org/rpms/swayimg.git /var/lib/mock/f42-build-3285062-41411/root/chroot_tmpdir/scmroot/swayimg
Cloning into '/var/lib/mock/f42-build-3285062-41411/root/chroot_tmpdir/scmroot/swayimg'...
$ git fetch origin 7259e3b0b3f2a39feaf46f19f59ea244f8ac0267:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/swayimg
 * [new ref]         7259e3b0b3f2a39feaf46f19f59ea244f8ac0267 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7259e3b Rebuild for jpegxl (libjxl) 0.11.1