$ git clone -n https://src.fedoraproject.org/rpms/rust-libmount.git /var/lib/mock/f39-build-1908725-42872/root/chroot_tmpdir/scmroot/rust-libmount
Cloning into '/var/lib/mock/f39-build-1908725-42872/root/chroot_tmpdir/scmroot/rust-libmount'...
$ git fetch origin a1f40735deaf6190507a165d541051d3e443dd11:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-libmount
 * [new ref]         a1f40735deaf6190507a165d541051d3e443dd11 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a1f4073 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild