$ git clone -n https://src.fedoraproject.org/rpms/rust-rust_decimal.git /var/lib/mock/f39-build-1500051-34782/root/chroot_tmpdir/scmroot/rust-rust_decimal
Cloning into '/var/lib/mock/f39-build-1500051-34782/root/chroot_tmpdir/scmroot/rust-rust_decimal'...
$ git fetch origin bc0ebe88455eba83c3580ba7eaa4afda0200a01d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rust_decimal
 * [new ref]         bc0ebe88455eba83c3580ba7eaa4afda0200a01d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bc0ebe8 Update to version 1.32.0; Fixes RHBZ#2233882