$ git clone -n https://src.fedoraproject.org/rpms/rust-sval_serde.git /var/lib/mock/f40-build-2652353-66893/root/chroot_tmpdir/scmroot/rust-sval_serde
Cloning into '/var/lib/mock/f40-build-2652353-66893/root/chroot_tmpdir/scmroot/rust-sval_serde'...
$ git fetch origin 56ec6048d4b056f23be61a64f0caeb09ec0555c2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-sval_serde
 * [new ref]         56ec6048d4b056f23be61a64f0caeb09ec0555c2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 56ec604 Update to version 2.11.1; Fixes RHBZ#2256402