$ git clone -n https://src.fedoraproject.org/rpms/imv.git /var/lib/mock/f42-build-868898-176325/root/chroot_tmpdir/scmroot/imv
Cloning into '/var/lib/mock/f42-build-868898-176325/root/chroot_tmpdir/scmroot/imv'...
$ git fetch origin 45fe5e10065526e36cfe8d0f63d0331f94b5d540:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/imv
 * [new ref]         45fe5e10065526e36cfe8d0f63d0331f94b5d540 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 45fe5e1 Rebuild for jpegxl (libjxl) 0.11.1