$ git clone -n https://src.fedoraproject.org/rpms/ursa-major.git /var/lib/mock/f38-build-side-42-init-devel-1081257-29830/root/chroot_tmpdir/scmroot/ursa-major
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1081257-29830/root/chroot_tmpdir/scmroot/ursa-major'...
$ git fetch origin c15da93d9f854c650c822e59358dacf93a3066fb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ursa-major
 * [new ref]         c15da93d9f854c650c822e59358dacf93a3066fb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c15da93 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild