$ git clone -n https://src.fedoraproject.org/rpms/rust-unicode-ident.git /var/lib/mock/f39-build-1489268-34501/root/chroot_tmpdir/scmroot/rust-unicode-ident
Cloning into '/var/lib/mock/f39-build-1489268-34501/root/chroot_tmpdir/scmroot/rust-unicode-ident'...
$ git fetch origin 1898eed34fb7a613df766dcdcb19aeb515565864:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-unicode-ident
 * [new ref]         1898eed34fb7a613df766dcdcb19aeb515565864 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1898eed Update to version 1.0.12; Fixes RHBZ#2238683